Anisotropic hot electron emission from fullerenes

Olof Johansson, Juraj Fedor, Motoshi Goto, Mikael Kjellberg, Jacob Stenfalk, Gordon Henderson, Eleanor E.B. Campbell, Klavs Hansen

Research output: Contribution to journalArticlepeer-review

Abstract

Photoelectron spectra for fullerenes C60 and C70 ionized using 800 nm laser pulses with pulse durations from 120 to 1000 fs show thermal electron kinetic energy distributions but they also exhibit angular anisotropy with respect to the laser light polarization. The effective temperature of electrons, measured along the laser polarization direction, is significantly higher than in the perpendicular direction. We explain this observation by considering that the emission of the thermal electrons is uncorrelated with the phase of the laser pulse, unlike directly ionized electrons, and, depending on the time of emission, they may experience an additional “kick” from the vector potential of the laser field when they are emitted from the molecule.
Original languageEnglish
Article number164301
Pages (from-to)-
Number of pages4
JournalThe Journal of Chemical Physics
Volume136
Issue number16
DOIs
Publication statusPublished - 23 Apr 2012

Keywords

  • fullerenes
  • hot carriers
  • light polarisation
  • photoelectron spectra
  • photoionisation

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